Several options available. Part number is 4E0941285G for reference.
1. Chinese made on eBay around £50 e.g.
https://www.ebay.co.uk/itm/165136880601
2. Non OEM on Autodoc from around £63
3. OEM on eBay (Lithuania) from around £135 e.g.
https://www.ebay.co.uk/itm/382747490401
4. OEM for £200 -
https://www.scuderiacarparts.com/par...0210.html#spec
BTW Welcome to the forum. For future reference, it would be helpful if you update your signature line with details of the car e.g. year, engine, etc. so that anyone willing to help knows exactly what the specs are, as part numbers vary. Also, pop along to the
Introductions section and introduce yourself... we also like photos
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts
My DIY jobs -
Replaced alarm horn,
Replaced Coolant Temp sensor,
Updated RNS-D firmware,
Installed Reversing Camera and Digital TV,
Dashcam Installation,
Retrofitted Rear Blinds,
Auto-Dimming Rear View Mirror,
Chrome Boot Struts
Sold! 
2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights
My DIY jobs -
Fan Jet Windscreen Washers,
Retrofitted Electric Side Blinds